Article: How Do We Know Where Things Are?
Source: Dartmouth College
Published: June 24, 2021
When
we move our eyes to look around a scene, the image of the world
projected onto our retina also moves, which in turn changes the image
that is sent to the brain. Yet, our brains perceive a stabilized view of
the world. Psychologists studying this process, known as "visual
stabilization," tested the brain's inherent "steady cam" through two
experiments, conducted both in person and online. The first experiment
is an example of “paradoxical stabilization,” in this case
demonstrating how a stabilized view is produced by a moving frame
replicated on a computer monitor. A second experiment
demonstrated that participants perceived the location of objects in
relation to (moving) frames, even when the objects themselves were
stationary. This effect held true across a wide range of frame speeds,
sizes, and path lengths tested. In other words, even though the image of
what we see "moves" on our retina when our eyes move, (1) the presence
of a frame in the scene stabilizes our judgments of location, and (2)
our brain
has a tendency to perceive objects in relation to available frames. As
the senior author of the study states, “Our results show that a framing
strategy is at work behind the scenes
all the time, which helps stabilize our visual experience.”
My rating of this study: ⭐
Özkan M, Anstis S, Hart BM, et al. "Paradoxical stabilization of relative position in moving frames." PNAS. 18(25):e2102167118. 22 June 2021.
Tuesday, September 28, 2021
Framing Strategies Stabilize Visual Perception
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